---
title: Application.WarnOnFunctionNameConflict Property (Excel)
keywords: vbaxl10.chm133305
f1_keywords:
- vbaxl10.chm133305
ms.prod: excel
api_name:
- Excel.Application.WarnOnFunctionNameConflict
ms.assetid: c29a9dbc-cd1f-18cc-2d44-ec639b0e67fa
ms.date: 06/08/2017
---


# Application.WarnOnFunctionNameConflict Property (Excel)

The  **WarnOnFunctionNameConflict** property, when set to **True** , raises an alert if a developer tries to create a new function using an existing function name. Read/write **Boolean** .


## Syntax

 _expression_ . **WarnOnFunctionNameConflict**

 _expression_ A variable that represents an **Application** object.


## See also


#### Concepts


[Application Object](application-object-excel.md)

